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Proceedings Paper

Temperature and wavelength dependent emissivity of a shocked surface: a first experiment
Author(s): Peter Poulsen; David E. Hare
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Paper Abstract

We have conducted an experiment in which the temperature and the wavelength dependent emissivity of a shocked surface has been measured. In the past, only the thermal emission from the shocked surface has been measured. The lack of knowledge of the emissivity as a function of wavelength leads to uncertainty in converting the measured emission spectrum into a surface temperature. We have developed a technique by which we are able to calculate both the emissivity of the shocked surface over a range of relevant wavelengths and the temperature of the surface. We use a multi-channel spectrometer in combination with a pulsed light source having a known spectrum of infrared radiation. Two separate techniques using a pulse of reflected radiation are employed and described. Both give the same result: An initially polished molybdenum surface that is shocked and partially released has a temperature of 1040 degrees Kelvin and a wavelength ((lambda) ) dependent emissivity of 0.16 ((lambda) =1.2micrometers ), 0.10 ((lambda)

Paper Details

Date Published: 15 March 2002
PDF: 9 pages
Proc. SPIE 4710, Thermosense XXIV, (15 March 2002); doi: 10.1117/12.459631
Show Author Affiliations
Peter Poulsen, Lawrence Livermore National Lab. (United States)
David E. Hare, Lawrence Livermore National Lab. (United States)

Published in SPIE Proceedings Vol. 4710:
Thermosense XXIV
Xavier P. Maldague; Andres E. Rozlosnik, Editor(s)

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